On 9 May, Anzac led six flotilla destroyers on an attack exercise against the Sixth Division of the Battle Fleet in visibility conditions of 4-6,000 yards. The attack was considered especially realistic, as the destroyers had just given up on the tardy target formation when it appeared at 1011 at 6,00 yards. Anzac signalled "AU 2" to order the flotilla torpedo attack as the targets commenced a four point turn. Six torpedoes were fired two minutes after the attack commenced: Anzac's struck Neptune, Penn's against St. Vincent, one torpedo endangering the enemy, one hit on a friendly destroyer, one wasted shot due to deflection being entered backward, and the other torpedo's result undetermined.[30]

June, 1918

On paper, Orford has been removed and Osiris is confusingly listed for both the Thirteenth Destroyer Flotilla and the Fourteenth. Judging by the next month's Supplement, I am going to guess that Orford is actually in the Fourteenth and that Osiris has gone to the Thirteenth (she would return in August).